专利汇可以提供Optical information recording carrier专利检索,专利查询,专利分析的服务。并且PURPOSE: To make information reading-out hardly affectable by the inclination of an optical card by propagating the luminous flux introduced from a light introducing part into an optical waveguide, emitting said flux from an information recording surface and making the flux incident perpendicularly on an optical sensor.
CONSTITUTION: The optical card 40 is constituted of a substrate 41, the optical waveguide 42 formed thereon, the information recording surface 43 and a transparent protective film 45. The luminous flux from a light source 49 is introduced from the light introducing part 44 to the card 40, is propagated in the waveguide 42 by a diffraction grating 47 provided to the waveguide 42, is diffused by a diffusion surface 48 and is transmitted through a light transmission part 43
-1 of the recording surface 43 from which the luminous flux is imaged as signal light onto a photodetector array 52. The information detection is thus executed. The card 40 is made into a thin type according to the above-mentioned constitution, by which the reading is executed from the direction perpendicular to the card. The optical system which is strong to the inclination of the card 40 is thus constituted.
COPYRIGHT: (C)1987,JPO&Japio,下面是Optical information recording carrier专利的具体信息内容。
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